Responses
Because “romance”! Plus I doubt her parents would have let the bro keep them apart. More than likely, they’d give the bro privileges to tease Rei about not being man enough, but otherwise leave the two lovers alone.
What a pity. We were going so well, with a non stereotypical ML, no macho crap but now this manga goes and choose to have the ML "fighting" the brother for the right to live with her? Why the author had to go and turn her into a kid incapable of choosing her own partner? Damn I was so happy with this one